Python 3.x Compatibility

[rlkiser]

I realize it's probably a long road, but it would be good to get to Python 3 if possible before too many dependencies shack up and make migration harder.

[deltaray]

Agreed. I've already done some of the work such as switching prints to using print() and a few other things.

[rlkiser]

If you can put together a list of issues I can start work on them.